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v3.23.3

NATURE OF OPERATIONS (Details) |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 30, 2023 | Feb. 10, 2023 | Jan. 12, 2023 USD ($) | Mar. 31, 2022 USD ($) | Mar. 15, 2022 USD ($) | Nov. 30, 2023 USD ($) | Jan. 31, 2023 | Sep. 30, 2023 USD ($) | Sep. 30, 2022 USD ($) | Sep. 30, 2023 USD ($) segment | Sep. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Clinical improvement scoring index, cohort 1 (percent) |  |  |  |  |  |  | 1.00% |  |  |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  |  | 1 |  |  |
Reverse stock split ratio |  | 0.0556 |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  |  | $ 6,584,000 | $ 9,459,000 | $ 22,264,000 | $ 13,265,000 |  |
Cash used in operations |  |  |  |  |  |  |  |  |  | 20,204,000 | 24,389,000 |  |
Cash and investments |  |  |  |  |  |  |  | 15,502,000 | $ 35,577,000 | 15,502,000 | 35,577,000 | $ 30,975,000 | $ 42,855,000
Accumulated Deficit |  |  |  |  |  |  |  | 685,148,000 |  | 685,148,000 |  | $ 662,735,000 |
Deferred payment received from sale of MST Franchise |  |  | $ 5,000,000 |  |  |  |  |  |  | 5,000,000 | $ 15,666,000 |  |
Debt outstanding |  |  |  |  |  |  |  | $ 0 |  | $ 0 |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Clinical improvement scoring index, cohort2 (percent) | 2.00% |  |  |  |  |  |  |  |  |  |  |  |
Lincoln Park Equity Purchase Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration receivable on transaction |  |  |  | $ 30,000,000 | $ 30,000,000 |  |  |  |  |  |  |  |
Term of equity purchase agreement |  |  |  | 36 months | 36 months |  |  |  |  |  |  |  |
Private Placement | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds |  |  |  |  |  | $ 88,200,000 |  |  |  |  |  |  |

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